GB806504A - Improvements in or relating to electrical impedance matching transformers - Google Patents

Improvements in or relating to electrical impedance matching transformers

Info

Publication number
GB806504A
GB806504A GB2944754A GB2944754A GB806504A GB 806504 A GB806504 A GB 806504A GB 2944754 A GB2944754 A GB 2944754A GB 2944754 A GB2944754 A GB 2944754A GB 806504 A GB806504 A GB 806504A
Authority
GB
United Kingdom
Prior art keywords
pitch
helix
transmission line
inner conductor
impedance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2944754A
Inventor
Frederick John Henry Charman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB2944754A priority Critical patent/GB806504A/en
Publication of GB806504A publication Critical patent/GB806504A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38—Impedance-matching networks
    • H03H7/383—Impedance-matching networks comprising distributed impedance elements together with lumped impedance elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices

Landscapes

  • Waveguides (AREA)
  • Communication Cables (AREA)

Abstract

806,504. Transforming impedances. ELECTRIC & MUSICAL INDUSTRIES Ltd. Oct. 13, 1955 [Oct. 13, 1954], No. 29447/54. Class 40 (8). [Also in Group XL (c)] An impedance matching transformer for matching the impedance of a radio aerial to its feeder comprises a transmission line having an inner conductor 2 and an outer conductor 4. The inner conductor is wound helically along a core 1 of insulating material with the pitch of helix varying continuously from a small pitch at one end to a larger pitch at the other. Insulation 3 is provided between the inner and outer conductors. As shown, the transmission line is connected at its lower end to a coaxial feeder 5, 6, and the smaller pitch of the helix is at the upper end so that the transformer is arranged to match an aerial of higher impedance to the feeder 5, 6. In another embodiment (Fig. 2, not shown), the insulating core 1 is conical in shape and the inner conductor is wound along it in a helix of constant pitch to produce the same effect. The pitch of the helix winding, the winding diameter, and the nature of the dielectric core may be varied either singly or in combination along the transmission line to produce the required matching. Preferably the variation is continuous but may be by steps.
GB2944754A 1954-10-13 1954-10-13 Improvements in or relating to electrical impedance matching transformers Expired GB806504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2944754A GB806504A (en) 1954-10-13 1954-10-13 Improvements in or relating to electrical impedance matching transformers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2944754A GB806504A (en) 1954-10-13 1954-10-13 Improvements in or relating to electrical impedance matching transformers

Publications (1)

Publication Number Publication Date
GB806504A true GB806504A (en) 1958-12-23

Family

ID=10291707

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2944754A Expired GB806504A (en) 1954-10-13 1954-10-13 Improvements in or relating to electrical impedance matching transformers

Country Status (1)

Country Link
GB (1) GB806504A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2245429A (en) * 1990-03-27 1992-01-02 Nissan Motor Plane patch antenna

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2245429A (en) * 1990-03-27 1992-01-02 Nissan Motor Plane patch antenna

Similar Documents

Publication Publication Date Title
GB861229A (en) Radio frequency impedance matching section
GB608147A (en) Improvements in or relating to electric cables
GB650425A (en) Improvements in or relating to concentric conductor electric cables
GB903617A (en) Improvements in or relating to transmission media for electromagnetic wave energy inthe circular electric mode
US2406945A (en) Insulator for concentric transmission lines
GB982748A (en) Low capacitance type of high-frequency cable
GB453770A (en) Improvements in or relating to multiple conductor electric cables insulated with magnesia
US3783415A (en) Transformer
GB695926A (en) Improvements in or relating to telecommunication cables
GB1116645A (en) Improvements in or relating to radio frequency transmission paths
US3223954A (en) Connector having an impedance matching transformer
GB806504A (en) Improvements in or relating to electrical impedance matching transformers
GB570087A (en) Improvements in electrical transmission lines
US2755466A (en) Antenna structure
ES243190A1 (en) Improvements in the formation of an elastically extensible electric current conducting cable
GB606551A (en) Time-delay transmission line
GB723119A (en) Improvements in or relating to electrical phase inversion systems
GB650428A (en) Improvements in or relating to electric cables for high frequency
GB772605A (en) Improvements relating to balance-to-unbalance transformers
GB742614A (en) Electrical rolled condenser
GB688063A (en) Improvements relating to antenna arrangements for radio-receiving apparatus
GB612061A (en) Insulators for high tension transformers
GB592060A (en) Improvements relating to electric cables and the manufacture thereof
SU126924A1 (en) Low Frequency Long Distance Cable with Cord-Styroflex Insulation
GB701894A (en) Improvements in or relating to high frequency variable inductances